Update more examples, add css for more examples

examples/read_size.rs

@@ -1,4 +1,9 @@
-#![allow(clippy::await_holding_refcell_ref)]
+//! Read the size of elements using the MountedData struct.
+//!
+//! Whenever an Element is finally mounted to the Dom, its data is avaiable to be read.
+//! These fields can typically only be read asynchronously, since various renderers need to release the main thread to
+//! perform layout and painting.
+
 use std::rc::Rc;
 
 use dioxus::{html::geometry::euclid::Rect, prelude::*};
@@ -33,6 +38,7 @@ fn app() -> Element {
     let read_dims = move |_| async move {
         let read = div_element.read();
         let client_rect = read.as_ref().map(|el| el.get_client_rect());
+
         if let Some(client_rect) = client_rect {
             if let Ok(rect) = client_rect.await {
                 dimensions.set(rect);